@agua4fun, I didn’t use connectors. The Bluetooth and remote modules are soldered to the ESC and sealed in a large connector box.
Please see the image in this post:
Russian͏ - EFOIL.builders / Builds - FOIL.zone
The USB connector does not need to be waterproof because it does not have power wires inside. And I cut it off because I do not use it.
If you have any additional questions, please don’t hesitate to ask, I’m always happy to answer.